Rolls for curving sheet-metal pulley-rims.



No. 694,910. Patented Mar. 4,1902. T. GORSC-ADEN, Decd. A. 1. cohscAnEu. Admihistra'trix. BULLS FOR CUBVING SHEET METAL PULLEY RIMS.

(Application mad In. 28, 1899.) I

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(No Model.)

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No; 6943M. Patented Mar. 4; 902. T. CORSCADEN. DBBd;

A. l. CBRSCADEN. Administratrix. ROLLS FUR CURVING SHEET METAL PULLEY RIMS (Applicafiun filed Bar. 98, 1899.)

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Units STATES ADELIN E J. OORSOADEN, OFPHILADELPHIA, PENNSYLVANIA, ADMINIS- TRATRIX OF THOMAS GORSGADEN, DECEASED.

ROLLS FOR CURVING SHEET=METAL PULLEY=RIMS.

SPEGIFIGATION forming part of Letters Patent No. 694,910, dated March 4, 1902.

Application filed March 28, 1899. Serial No. 710,857. (No model.)

set forth in the following specification and shown in the accompanying drawings, which form a part thereof.

The object of the invention is to provide suitable rolls for treating sheet-metal blanks to preliminary operations which shall curve and bend the blank both in the direction of its length and also transversely on its lateral.

edges to such an extent that it may be subsequently treated in suitable dies for the purpose of formingasemicircular rim-blank suitable for the rims of sheet-metal pulleys,,such as set out in Letters Patent No. 595,559, December 14:, 1897, and No. 575,106, January 12, 1897, to Gorscaden. The blanks formed by this improved machine are subsequently treated by dies actuated byhydraulicor other pressure to cause one of the edges of the curved rim to be curled over into a bead and the other edge into a right-angled flange to which the pulley-spokes are secured, the dies and press for such subsequent operation be ing clearly set out in application Serial No. 689,533,1i1ed August 25, 1898.

In carrying out the present invention a pair of rolls is provided which are adapted to treat a strip of sheet metal in such a manner as to curl over one edge and bend a greater portion of the other edge into an angular rim, the sheet metal being fed between said rolls by suitable means under the control of the operator. The sheet metal so formed passes directly. into a second set of rolls, which is designed solely to act upon the saidmetal in the direction of its length for the purpose of curving the sameinto a semicircular shape. It will thus be'seen that the first set of rolls operate upon the metal transversely to its length, whereas the second set operate thereon in the direction of its length, the result of the two sets of rolls being the production of a semicircular or approximately semicircular strip having its longitudinal edges respec- 'tively curved upward audbent over toward the center of curvature of the blank considered as an entirety. As the widths of the blanks to be treated vary to suit the differeut width-of the faces of the pulleys to be manufactured, it is preferable to provide the first set of rolls, which bend the blank transversely to its length, with a series of removable sections which are preferably so pro portioned'that by the insertion or removal or transposal Of'l'HOIG or less of said sections different widths of rolls may be secured, so as to bring'their bending portions nearer or farther apart, as maybe required. The second set of rolls is arranged to permit the passage of the lateral bent edges of the blank while curving said blank in the direction of its length. These rolls need not be made adjustable in width. V

The invention further com prehends details of construction which will be betterunderstood by reference to the accompanying drawings, in which i Figure 1 is a side elevation of the improved machine, taken on line a a; of Fig. 3. Fig. 2 is an end elevation of the improved machine. Fig. 3 is a plan view of the same. Fig. 4: is

line y y, Fig. 3. Fig. 5 is a transverse section through the blank after being treated by the rolls, and Fig. 6 is a longitudinal section of the same.

E is the main frame vof the machine and comprises a baseor bed plate and four upward housings of any suitable construction.

A A comprise one set of rolls- -na nely, those which operate upon the sheet metal transversely to its lengtha'nd K L L constithe sheet metal in the direction of its length to curve it. Referring to the rolls A A, they are each composed of a series of annular sleeves or sections B, fastened upon the shafts a longitudinal section through the rolls on tute the other set of rolls and operate-upon or mandrels R R by keys or in any other suitable manner. By examining Fig. 2 it will be observed that the upper roll A has its right-hand end section formed with a beveled surface 0 and its left-hand end section formed with acurved shoulder portion d, and the lower roll A has the corresponding end sections formed with an outwardly-beveled flange c and an outwardly-curved flange D,

said parts 0 c coacting together and simi larly the parts 01 D coacting. The plate which is passed between these rolls is rectangular in shape and of considerable length. When passed between the rolls A A, the lefthand edge of said plate T is curved upward, as indicated at t in Fig. 5, while the other or opposite edge is bent upward at an angle, as indicated at t, Fig. 5. Subsequently the curved edge 75 becomes bent over into abead, while the angular part T is bent at-right angles to the body part and forms an inwardlyprojecting flange. By removing one or more of the intermediate parts of the rolls A A or by transposing its sections it is evident that the end sections, which perform the bending actions, will be adjusted nearer together to suit narrower-faced blanks. 'The variation in the width of these sectionsB enables the proper adjustment for all necessary variations in widths of the faces of the blanks. Ordinarily the wide sections B would never be removed,'as they would constitute the sections'required'to be interposed between the end sections to suit the various widths of blanks to be treated, but it is evident that they may be removable, if so desired. The

' flanged on the sides of the blank, and to secure this result guidesII are provided. The guide I- may be set at an angle, as indicated in Fig. 1, and is notched to limit the lateral adjustment of the blank. The other guide I is made L-shaped, and its guiding edge projects toward the rolls, as clearly shown in Fig. 3. This guide is also adjustable to and from the other guide I by means of adjusting devices i to suit difierent widths of blanks. The blank is placed upon the guide I, which is of considerable length, and then pushed toward the rolls and between the gripping-jaws H H of the hand-lever G. The lower of these jaws is held in an upright position by a spring h, and the upper jaw is free. The gripping-surfaces of these jaws are arranged eccentric to their pivots. It will now be observed that when the plate is shoved into position till it about reaches the rolls A A the lever G is thrust forward, which action causes the plate to be gripped and forcibly pushed between the rolls A A. As soon as the plate is gripped by the rolls it is driven forward and the jaws H H automatically release their action upon it, and the plate continues to pass forward. It is evident that any other suitable feeding mechanism may be employed, if so desired, though the above-described apparatus has been found excellent in practice. It is also to be understood that the blanks to be treated bythe rollsA A may be ordinary flat blanks, or, if de'sired,the lateral edges maybe slightly bent upward by a previous operation.

'After the blank has been treated in the rolls A A it moves forward and is received between the rolls KL L. y The rolls A A are geared to the rolls K L L by connecting-gears J J J so as to insure the speeds of thetwo sets of rolls being commensurate relativelyv one to the other. These rollscomprise a large upper roller K and two small rolls L L. The

upper roller K is positively driven; but-,it isnot necessary that the lower rolls L L should be positively driven; but they may be so, if

desired. The blank in passing between the,

rolls K and L is curved upward ,the said curvature being proportional to the amount of de-.

ICO

roller K, being onthe side of the greatest cure vature, must be so formed as topermitthe passage of the flanged edges 25 t. The edge 25 is permitted tofreely pass by simply making the roller K short, asindicated in Fig. 3; but

the surface of the roller at the other end is y grooved, as at K, so that for different widths of blank the curved edge twillbe permitted to pass forward through oneof said grooves, and thereby not injured. It is evident that, if desired, different widths of rollers K might be employed; but this'is not essential, as the grooved roller obviates the necessityof loss of time in dismantling and rearranging the roller K, and, furthermore, the portions of the roller between the grooves areamply snflicient for holding the plate down to the rollers L L, insuring the curvature of said plate.

By the employment of rolls of the character herein described the plates may be rapidly and accnratelyfiangcd and curved to suit the requirements of subsequent operations in the press and the single machine herein disclosed is suitable for flanging rims for a large variety of pulleys of different diameters and widths of faces. V 1 r While the construction herein illustrated is preferred, itis evident that the minorwdetails may be modified without departingfrom the principles of the invention.

annular reduced portions for receiving the Having now described the invention, what is claimed as new, and desired to besecured by Letters Patent, is-

1. J In amachine for shaping blanks for. pul ley-rims, the combination of two independent sets of positively-driven rolls arranged in alinement, one set being of itself adapted to bend the lateral edges of the plate by acting upon the metal transversely to its length, and the other of which is wholly of itself adapted to'act independently on themetal sheet and bend it in the direction of its length to curve it the construction beingsuch that the bending action of each set of rolls is independent of the other set and the main roll of the set of curving-rolls being formed with annular reduced portions for receiving the flanges of the sheet and preventing flattening them out, and-gearing to positively drive each'set of rolls to enable them to operateat relatively definite speeds.

2. In a machine for shaping blanks for pulley-rims, the combination of two independent set of rolls arranged in alinement but at a considerable distance apart one set'being' adapted to bend the lateral edges of the plate by acting uponthe metal transversely to its" length, and theother of which is adapted to bend the sheet in the direction of its length to curve it independentlyof any'action of the first-mentioned set of rolls and the main rollof the 'set of curving-roll's'being formed with flanges of the sheet and preventingfiattenin g them out, and connecting-gearing between the first and second "sets of'rolls whereby the second set of rolls is positively driven audits speed is commensurate with that'of the first set of rolls. V g Y 3; In a machine for shaping sheet metal to form pulley-rims, thecombination of a'pair of rolls adapted to act upon the sheet trans versely to its length for thepur'pose of flang ingthe lateral edges thereof, two fixed guides I I-fo1"guiding the metal into' said rolls one of said guides I having an oblique face, and feeding devices located near the other guide "for 'forcingthe' metalinto said rolls comprising a movable lever portion having gripping jawsprovided with fiat gripping-surfaces to grip the sheet on the side farthestfrom the oblique guide-face when movedtoward the rolls and release it upon being moved away from the rolls or when'the sheet is pulled be tween 'thejaws in the direction of the rolls.

4. In a machine for shaping'sheet metal to form pulleyrims,'the combination of a pair of rolls adapted toactu pon the sheet trans-1 versely to its length for the purpose of flanging the lateral edges thereof, guides for guiding the metal into saidrolls comprising guide I presenting a vertical guide-face and oblique guide I presenting an oblique face and longitudinal guide-shoulder, and feeding mechanism consisting of a pivoted lever Gr, two gripping-jaws H, H, pivoted to the leverand havlength for flanging the lateral edges thereof, 7 5

an independent set of rolls -arranged in line with the first-mentioned pair of rolls and operating solely of themseves for curving the sheet blank in the direction of its length and. consisting of a large bending-roll and two 8o smaller rollers arranged close to the face of the larger roller and between which and the larger roller the sheet-metal blank'is caused to p'ass,-the large bending-roll having reduced portions in diameter for receiving the flanges '8 5 of the sheet and preventing flattening them out and gearing between the first and second sets of rolls whereby the speed of the second lsetof rolls is commensurate with that of the first set of rolls and each set of rolls positively o operate u pen the sheet to perform its function 1 independently of that being performed by the other; l j

6. In a machine for'shapingblanks for puli ley-rims, the 'combination'of two flan gin -ro11-- 9 5 ers adapted to work together having'adjnstable sections whereby said I sections may be transposed'jso 'as to adjust the fianging'por- 'tionsias to their working length to correspond 'to diiferent widths'of blanks between the lat- Ice era'l flanged portionsthereof without changing the length of thebody of the rolls, and means for feeding a sheet of 'inetal'between the said flanging-rollers. w

7. In a machine for. shaping blanks for pulley-rirns, the combination of two fianging-rollg ers adapted tow'ork together having adjust- :able sections whereby they may be adjusted as to their working length to correspondtodif ferent widthsofiblanks between 'the lateral iic flanged portionsthereofl'ineansfor feeding'a sheet of metalbetween the said flange-rollers,

anda set of curving-rollersarranged tothe rear of the hanging-rollers and comprisingja' curving roller at one level formed with grooves about its periphery to receivethe' flanges at one edge and the sheet treated in the fianging-rollcr's, and two rollers at a different levelworkingin conjunctionwi'ththe curving-roller whereby the'flanged sheetis' then curved in the direction of its length."

8. In a machine for shaping blanks for pu'l ley-rims, the combination of flanging-rollers adapted towork together having shafts fitted with adjustable sections abutting againsti25 each otherand clamped togetherwhereby;

they may be adjusted as'to their'working lengthito correspond todifferent widthsoffblanks between the lateral flanged portions thereof, and a set of curving-rollers arranged 1'30 to the rear of the flanging-rollers.

9. In a machine for shaping blanks for pulley-rims, the combination with apair of flang- In testimony of whichinventionihave hereto ing-rollers with curving devices arranged to unto set my hand. the rear of the fianging-rollers and comprls- ADELINE CORSCADEN,

ing a curving-roller formed with grooves I U .4 I 1 5 about its periphery to receive the flanges of l ggz 'z ggigjg estate 9 Thomas 00mm the sheet treated in the Hanging-rollers, and guiding devices for holding the flanged sheet Witnesses:

against the curving-roller while passing in JERE. J. CROWLEY, contact therewith. S. \VARREN HALL. 

